Cole, Fallon ain't going anywhere soon. Comcast/NBC loves him and his ratings and there is a long term contract in place. I got the impression they are looking for a 10 year attraction at best.
I still don't know, talk shows are always flaky with their hosts no matter the contract. He could be ditched like conan the second the ratings go down. Just not a timeless thing to base an entire attraction unless they are willing to update it everytime the tonight show gets a new host